DATABASE DESIGN USING NORMALIZATION QUIZ

The design guidelines and priorities for read-only databases are different because read-only databases are never updated.

True

False

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Needing to assess the validity of assumed referential integrity constraints on foreign keys is a(n) ________ of normalization.

advantage

disadvantage

neither an advantage nor disadvantage

either an advantage or disadvantage

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Read-only databases are ________ updated.

always

never

commonly

seldom

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When assessing the table structure of an acquired set of tables with data, determining primary keys is (part of) the:

first step.

second step.

fourth step.

third step.

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If a table has been normalized so that all determinants are candidate keys, then that table is in:

BCNF.

2NF.

1NF.

3NF.

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Normalization ________ data duplication.

increases

maximizes

reduces

eliminates

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Using the SQL GROUP BY phrase with a SELECT statement can help detect which of the following problems?

The multivalue, multicolumn problem

The inconsistent values problem

The missing values problem

The general-purpose remarks column problem

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For a number of reasons, normalizations is not often an advantage for a(n) ________ database.

either a read-only or an updateable

updateable

read-only

None of these

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One common design problem when designing a database from existing data is the use of a single cell in one column to store multiple values of an attribute.

False

True

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Each answer below shows example data from a table. Which answer is an example of the inconsistent values problem?

One row has the value "He is interested in a Silver Porsche from the years 1978-1988" in a column.

Three rows have the values Brown, NULL, and Blue in the same column.

Three rows have the values Brown Small Chair, Small Chair Brown, and Small Brown Chair in the same column.

Three columns have the values 534-2435, 534-7867, and 546-2356 in the same row.

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